Door-spring



W. P. MARTIN.

DOOR SPRING.

APPLICATION FILED OCT-8,1919.

1,328,961 Patented Jan. 27, 1920.

UNITED STATES PATENT ornion.

WILLIAM F. MARTIN, 0F NASHUA, IOWA.

DOOR-SPRIN G.

Application filed October 8,

To all whom it may concern.-

Be it known that I, WVILLIAM P. MARTIN, a citizen of the United States of America, and resident of Nashua, in the county of Chickasaw and Stateof Iowa, have invented certain new and useful Improvements in Door-Springs, of which the following is a specification.

This invention relates to door closing devices, particularly to springs operative to return the door to its closed position. a

An object of this invention is to provide novel means for returning the door to its closed position, which means are in such operative relation to the door as to leave the opening unrestricted after the door is opened.

A still further object of the invention is to provid an auxiliary spring which augments the action of a coil spring anchored directly to the door frame.

IVith the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail. reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in which Figure 1 illustrates a view in elevation of a fragment of a door and frame with the device embodying the invention applied thereto; and

Fig. 2 illustrates a plan view showing the door open.

In these drawings 15 denotes a door frame and 6 a door, the said door being hinged to the frame as shown at 16 The bracket of the door closer comprises a base plate 17 having ears 18 to receive a Specification of Letters Patent. Patented J an. 27, 1920.

1919. Serial No. 329,294.

pintle 19. A yoke 20 has eyes 21 to receive the pintle, and the yoke is thereby swingingly mounted on the said pintle.

A coil spring 22 is wound around the pintle and one end of the said spring is anchored to the yoke 20 as at 23, whereas the other end 24 of the coil spring bears against the plate 17 so that the pressure or the tension of the spring is maintained.

' .he yok is preferably of such length as to extend beyond the surface of the door when the door is open, so thatit will exert a pull at a tangent to the aXis of the hinges of the door. A link 25 has an eye 26 coupled to the yoke at its center and the opposite end of said link is connected to a spring 26 which has one end anchored to an eye bolt 27 secured to the door approximately centrally of its height. The last connection of the link or pulling device between the yoke and the anchorage 27 permits these parts to lie close against the door without in any way injuring it, and at the same time the auxiliary spring 26 improves th eiiiciency of the device and increases its durability.

I claim:

In a door closing device, a bracket including a pair of opposed ears, adapted to be secured to a door casing, a pintle mounted in the ears, a yoke having its ends embracing the pintle and having a central offset portion, a coiled spring having one end t iereof anchored to a door, a connecting link connecting the spring and yoke, said link having one of its ends positioned in the offset portion of the yoke, and a coiled spring encircling the pintle and having one of its ends connected to the yoke for exerting pressure on the yoke.

WILLIAM P. MARTIN. 

